code: def _install():
      from ..core import Tensor, TensorData
  
      for cls in (Tensor, TensorData):
          setattr(cls, "ptp", ptp)
  
file_path: mars/mars/tensor/statistics/__init__.py
imports: from .average import average
  from .bincount import bincount
  from .corrcoef import corrcoef
  from .cov import cov
  from .digitize import digitize, TensorDigitize
  from .ptp import ptp
  from .histogram import histogram_bin_edges, TensorHistogramBinEdges, histogram, TensorHistogram
  from .quantile import quantile
  from .percentile import percentile
  from .median import median
label_desc: Use image node_id 1 for calling a global function with example usage: _install() without return types